From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keith Coleman Subject: Re: windows domU disk performance graph comparing hvm vs stubdom vs pv drivers Date: Tue, 23 Feb 2010 15:11:13 -0500 Message-ID: <5411dbdc1002231211k36258359j3e027dde355e1ba4@mail.gmail.com> References: <5411dbdc1002191441q4becdba9o61168bc986533e6@mail.gmail.com> <5411dbdc1002220914m2cf15fack76aed42a4fca1a32@mail.gmail.com> <5411dbdc1002221313y59866dd2k3ba528fe2b5499d@mail.gmail.com> <20100223144424.GB25741@phenom.dumpdata.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Return-path: In-Reply-To: <20100223144424.GB25741@phenom.dumpdata.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Konrad Rzeszutek Wilk Cc: "xen-devel@lists.xensource.com" , Stefano Stabellini List-Id: xen-devel@lists.xenproject.org On Tue, Feb 23, 2010 at 9:44 AM, Konrad Rzeszutek Wilk wrote: >> > > That is strange because in that configuration I get a far better >> > > disk bandwidth with stubdoms compared to qemu running in dom0. >> > > >> > >> > What type of test are you doing? >> > >> >> these are the results I got a while ago running a simple "dd if=/dev/zero >> of=file" for 10 seconds: > > Keep in mind that iometer (both the Windows a Linux version) by default > do random seak of 50% reads and 50% writes. They do have some set of > templates - "web server", "file server", "database server" that change > the read/write ratio, size of blocks, and the queue length.(fyi, you can > use fio to set the same values, if you can't get dynamo to compile on > your Linux box). > > Keith, which workload did you choose? > Web server workload was used in my graph. Keith Coleman